After-Hours Moves Friday: Zoetis Inc., Boise Cascade Co

Silicon Motion Technology Corp.

bounced up 3 percent after the bell Friday to $36 a share. The stock was off more than 6 percent earlier and the company didn't issue news. Xactly Corp

rose 3 percent in late trading to $8.99. The provider of employee incentive programs closed up earlier by 8 percent. Late Thursday, the company priced its initial public offering at $8 a share. Encana Corporation

gained 2.7 percent in the after-hours session to $11.55. The gas and oil company closed down earlier by the same percentage. First Majestic Silver Corp

bounced up 1.7 percnet to $5.01 in late trading. The shares closed down nearly 4 percent earlier. Zoetis Inc

edged up 1.7 percent to $49.43 in late trading. The veterinary medicine company closed down 12 percent earlier despite a reported bid from Valeant Pharmaceuticals Intl Inc

. Boise Cascade Co

tumbled more than 8 percent in the extended session Friday to $35.20 without an obvious catalyst. The shares closed down earlier more than 2 percent. Seres Therapeutics Inc

fell 6.6 percent in the after-hours session to $48. Earlier Friday, the shares closed up 185 percent in their first day of trading. Ocean Rig UDW Inc

fell nearly 3 percent to $5.45 in late trading Friday. The company didn't issue news. WhiteWave Foods Co

declined 1.8 percent to $49 after the bell. The consumer packaged food and beverage company did't issue news Friday. Oneok Partners LP

fell 1.3 percent to $35.37 in the late session. The gas storage and transportation company closed down earlier by about the same percentage on no obvious catalyst.